Volume 47, Issue 5
  • ISSN: 0002-9637
  • E-ISSN: 1476-1645



Mosquitoes collected from coastal, inland valley, and alpine locations in California were evaluated for their experimental vector competence for two viruses in the California serogroup (Bunyaviridae: ). , a coastal salt marsh mosquito, was an efficient vector of a California encephalitis (CE)-like virus isolated from its habitat (89% of the pledget-fed females became infected and 61% transmitted virus). , a coastal mosquito, and , an inland valley mosquito, were competent vectors of prototype CE virus (98% and 100% of the pledget-fed females became infected and 56% and 30%, respectively, transmitted virus). and transmitted both viruses vertically to one or more of 20 of their progeny. was susceptible to infection with both viruses, but 5% or less transmitted virus perorally. Alpine mosquitoes, , and , became infected with both CE and CE-like viruses, but 3% or less transmitted virus. All species of mosquitoes were more efficient vectors of both viruses following intrathoracic inoculation than following pledget feeding, suggesting the presence of mesenteronal barriers.


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